First Commit

common/FastJmp.h

@@ -0,0 +1,25 @@
+// SPDX-FileCopyrightText: 2002-2025 PCSX2 Dev Team
+// SPDX-License-Identifier: GPL-3.0+
+
+#pragma once
+#include "Pcsx2Defs.h"
+#include <cstdint>
+#include <cstddef>
+
+struct fastjmp_buf
+{
+#if defined(_WIN32)
+	static constexpr std::size_t BUF_SIZE = 240;
+#elif defined(_M_ARM64)
+	static constexpr std::size_t BUF_SIZE = 168;
+#else
+	static constexpr std::size_t BUF_SIZE = 64;
+#endif
+
+	alignas(16) std::uint8_t buf[BUF_SIZE];
+};
+
+extern "C" {
+int fastjmp_set(fastjmp_buf* buf);
+__noreturn void fastjmp_jmp(const fastjmp_buf* buf, int ret);
+}